C#

[DllImport("user32.dll")]
static extern IntPtr GetForegroundWindow();
[DllImport("user32.dll")]
static extern int GetWindowText(IntPtr hWnd, StringBuilder text, int count);

private string GetActiveWindowTitle()
{
    const int nChars = 256;
    StringBuilder Buff = new StringBuilder(nChars);
    IntPtr handle = GetForegroundWindow();
    if (GetWindowText(handle, Buff, nChars) > 0)
    {
        return Buff.ToString();
    }
    return null;
}

[DllImport("user32.dll")]
private static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

[DllImport("user32.dll")]
private static extern bool SetForegroundWindow(IntPtr hWnd);

public void Start(string NAME)
{
    MSG = lblMSG.Text.Trim();
    IntPtr zero = IntPtr.Zero;
    for (int i = 0; (i < 60) && (zero == IntPtr.Zero); i++)
    {
        Thread.Sleep(500);
        zero = FindWindow(null, NAME);
    }
    if (zero != IntPtr.Zero)
    {
       .
       .
       .
    }
}

byte[] ap = (byte[])(dsetName.Tables[0].Rows[0].ItemArray[2]);
                      if (ap == null)
                      {
                          pictureBox1.Image = null;
                      }
                      else
                      {

                          MemoryStream mmm = new MemoryStream(ap);
                          pictureBox1.Image = Image.FromStream(mmm);
}